Textron JACOBSEN GP400, Technical/Repair Manual

Page: 188 / 354

5-70 4252490-Rev A
HYDROSTATIC POWER TRAIN
5
30. Inspect thrust bearing (7) for signs of wear, brinelling,
corrosion, and for any damaged or missing rollers.
Replace as needed.
31. Remove seal (6), backup ring (5), and backup
washer (4) from housing (3), by working them around
the unseated thrust washers (12) and thrust bearing
(7).
32. Remove housing (3) from vise, invert it, and remove
and discard seal (1).
33. Inspect housing (3) for cracks, and inspect machined
surfaces for nicks, burrs, brinelling, or corrosion.
Remove burrs that can be removed without changing
the dimensional characteristics. Replace the housing
as needed.
!
CAUTION
NOTE
If inner bearing (8) requires replacement, measure and
record the depth of the inner bearing in relation to the
housing wear surface before removing the bearing. If
outer bearing (2) requires replacement, measure and
record the depth of the outer bearing in relation to the
beginning of the bearing counterbore before removing
the bearing.
34. Inspect inner bearing (8) and outer bearing (2). All
roller elements must be firmly retained in the bearing
cages and orbit freely. All rollers must be free of
brinelling and corrosion.
!
WARNING
NOTICE
35. Clean all parts using clean solvent, and dry using
compressed air.
36. Inspect all parts for wear or damage. Replace parts
as needed.
37. Apply a thin film of clean hydraulic oil to all parts to
prevent corrosion. Keep parts covered or stored in a
clean environment until assembly.
Remove the bearing only if replacement is
required. The bearing must not be reused once
removed.
Use appropriate eye protection when using
compressed air for cleaning or drying purposes.
Compressed air can cause serious personal
injury. Use safety reduction valves to reduce the
air pressure to a safe level before use.
It is important that all motor parts are absolutely
clean, as contamination can result in serious
damage and/or improper operation.
Never use shop towels or rags to dry parts after
cleaning, as lint may clog passages. Dry parts
using compressed air only.